package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    private Orders orders;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //为了代码健壮性 下面代码可能前端小程序会有检查
        //1.处理各种业务异常(地址簿为空,购物车数据为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //查询当前用户的购物车是否为空
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if(list == null || list.size() == 0){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2.向订单表插入一条数据
        Orders orders = new Orders();//跟订单表的id关联
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));//用时间戳作为订单号
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        this.orders = orders;//全局变量保存订单信息
        orderMapper.insert(orders);

        List<OrderDetail>orderDetailList = new ArrayList<>();
        //3.向订单明细表插入n条数据
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }
        //批量插入n条订单明细数据
        orderDetailMapper.insertBatch(orderDetailList);

        //4.清空当前用户的购物车数据
        shoppingCartMapper.deleteUserId(userId);

        //5.封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount()).build();
        return orderSubmitVO;
    }



    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    /**
     * 订单支付
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);
/*        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }
*/
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        Integer OrderPaidStatus = Orders.PAID;//支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单
        LocalDateTime check_out_time = LocalDateTime.now();//更新支付时间
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, this.orders.getId());
        //这个orderId是订单id如何获取? 我们直接在OrderServiceImpl中加一个全局变量orders,在submitOrders方法中赋值

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",1);//1表示来单提醒,2表示客户催单
        map.put("orderId",this.orders.getId());
        map.put("content","订单号:"+this.orders.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        return vo;
    }



//    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
//        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);
//
////        //调用微信支付接口，生成预支付交易单
////        JSONObject jsonObject = weChatPayUtil.pay(
////                ordersPaymentDTO.getOrderNumber(), //商户订单号
////                new BigDecimal(0.01), //支付金额，单位 元
////                "苍穹外卖订单", //商品描述
////                user.getOpenid() //微信用户的openid
////        );
////
////        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
////            throw new OrderBusinessException("该订单已支付");
////        }
//        //然后写入如下代码:
//        JSONObject jsonObject = new JSONObject();
//        jsonObject.put("code","ORDERPAID");
//
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//        return vo;
//    }




    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",1);//1表示来单提醒,2表示客户催单
        map.put("orderId",this.orders.getId());
        map.put("content","订单号:"+this.orders.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    /**
     * 用户端历史订单查询
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        //分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO>list = new ArrayList<>();
        //查询出订单明细,并封装入orderVO进行相应
        if(page!=null && page.size() > 0){
            for (Orders orders : page) {
                Long orderId = orders.getId();

                //查询订单明细
                List<OrderDetail>orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);

            }
        }
        return new PageResult(page.getTotal(),list);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());
        //封装订单信息
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;


    }

    /**
     * 取消订单
     * @param id
     */
    public void cancel(Long id) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在
        if(ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1.待付款 2.待发货 3.待收货 4.待评价 5.已完成 6.已取消
        if(ordersDB.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //订单处于待接单状态下取消,需要进行退款
        if(ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(),//商户订单号
                    ordersDB.getNumber(),//商户退款单号
                    new BigDecimal(0.01),//退款金额 单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 :退款
            orders.setPayStatus(Orders.REFUND);

        }
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消订单");
        orders.setCancelTime(LocalDateTime.now());
        //更新订单状态
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    public void oneMore(Long id) {
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();
        //根据订单id查询订单 在order_detail表中查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList= orderDetailMapper.getByOrderId(id);

        //将订单详情对象转换为购物车对象
       List<ShoppingCart>shoppingCartList = orderDetailList.stream().map(x->{
           ShoppingCart shoppingCart = new ShoppingCart();

           //将原订单详情里面的菜品信息重洗赋值到购物车中
           BeanUtils.copyProperties(x,shoppingCart,"id");
           //设置购物车的userId
           shoppingCart.setUserId(userId);
           shoppingCart.setCreateTime(LocalDateTime.now());
           return shoppingCart;
       }).collect(Collectors.toList());

       //批量插入购物车数据
       shoppingCartMapper.insertBatch(shoppingCartList);

    }

    /**
     * 管理员端订单查询
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult PageQuery4Admin(OrdersPageQueryDTO ordersPageQueryDTO) {
        //设置分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        //分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //部分订单状态,需要额外返回订单菜品信息,将Orders转换为OrderVO
        List<OrderVO>orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(),orderVOList);


       // List<OrderVO>list = new ArrayList<>();
        //查询出订单明细,并封装入orderVO进行相应
//        if(page!=null && page.size() > 0) {
//            for (Orders orders : page) {
//                Long orderId = orders.getId();
//                //查询订单明细
//                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
//
//                OrderVO orderVO = new OrderVO();
//                BeanUtils.copyProperties(orders, orderVO);
//                orderVO.setOrderDetailList(orderDetails);
//
//                list.add(orderVO);
//
//            }
//        }
       // return new PageResult(page.getTotal(),list);

    }

    private List<OrderVO>getOrderVOList(Page<Orders> page){
        //需要返回订单菜品信息,自定义OrderVO相应结果
        List<OrderVO>orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if(!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                //将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishesStr(orders);

                //将订单菜品信息封装到orderVO中,并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }

        }
        return orderVOList;
    }

    private String getOrderDishesStr(Orders orders) {
        //查询订单菜品详细信息(订单中的菜品和数量)
        List<OrderDetail>orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //将每一条订单菜品信息拼接成字符串(格式:宫保鸡丁*3;)
        List<String>orderDishesList = orderDetailList.stream().map(x->{
            String orderDishes = x.getName()+"*"+x.getNumber()+";";
            return orderDishes;
        }).collect(Collectors.toList());

        //将所有订单菜品信息拼接成字符串
        return String.join("",orderDishesList);
    }

    /**
     * 订单统计
     * @return
     */
    public OrderStatisticsVO getOrderStatistics() {
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        //根据不同status统计订单数量
        Integer toBeSent = orderMapper.countByStatus(Orders.CONFIRMED);
        Integer outOfDelivery = orderMapper.countByStatus(Orders.DELIVERY_IN_PROGRESS);
        Integer toBeConfirmed = orderMapper.countByStatus(Orders.TO_BE_CONFIRMED);

        orderStatisticsVO.setConfirmed(toBeSent);
        orderStatisticsVO.setDeliveryInProgress(outOfDelivery);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        //订单只有存在且状态为2(待接单)才能拒单
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
//        if(payStatus.equals(Orders.PAID)) {
//            //用户已支付,需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),//商户订单号
//                    ordersDB.getNumber(),//商户退款单号
//                    new BigDecimal(0.01),//退款金额 单位 元
//                    new BigDecimal(0.01));//原订单金额
//            log.info("微信退款结果:{}",refund);
//        }

        //拒单需要退款,根据订单id更新订单状态,拒单原因,取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO)throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if(payStatus.equals(Orders.PAID)){
            //用户已支付,需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),//商户订单号
                    ordersDB.getNumber(),//商户退款单号
                    new BigDecimal(0.01),//退款金额 单位 元
                    new BigDecimal(0.01));//原订单金额
            log.info("微信退款结果:{}",refund);
        }

        //管理端取消订单需要退款,根据订单id更新订单状态,取消原因,取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    public void deliveryOrdersById(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在,并且状态为3
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }


    /**
     * 订单完成
     * @param id
     */
    public void complete(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在,并且状态为4
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //更新订单状态,状态转为已完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 客户催单
     * @param id
     */
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        //校验订单是否存在,并且状态为4派送中
        if(ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",2);//1表示来单提醒,2表示客户催单
        map.put("orderId",id);
        map.put("content","订单号:"+ordersDB.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }
}
